[GHC] #14409: Split GHC(-API) into multiple packages

[GHC]

#14409: Split GHC(-API) into multiple packages
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           Reporter:  Lemming        |             Owner:  (none)
               Type:  task           |            Status:  new
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 Current GHC-API is pretty monolithic and a lot of data is hidden in
 monads.
 I'd prefer to have cleanly separated packages for parser, module system,
 type-checker, optimizer, code generator, linker. E.g. Haddock would
 certainly only use the first two, maybe three, steps. Advanced editing
 features in an IDE would use only the first three steps. A compiler for a
 Haskell dialect might use only optimizer and code generator.
 The packages should have clean interfaces. E.g. it should be possible to
 enter a Text or String into the parser and get a ByteString containing
 code or a pointer to executable code in memory from the code generator,
 with no need to write temporary files.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14409>
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